In order to increase our knowledge of methane emissions on a small scale
the project 'Sources, regional scaling and validation of CH4 emissions
from the Netherlands and Northwest Europe' is carried out in the
framework of Phase 2 of the National Research Program on Global Air
Pollution and Climate Change (NRP-2). This project aims at the
development of a validated CH4 emission database on a scale of 5x5 km and
25x25 km for the Netherlands and Europe respectively for the main source
categories. CH4 emissions are validated in this project by comparing
results of atmospheric models which use this emission database as an
input, with measured CH4 concentrations. In this report the data of
methane measurements at 4 locations in the Netherlands and 3 locations in
Northwest Europe over the period 1990-1994 are gathered and reported.
Besides data on CH4 concentrations also meteorological data as measured
by KNMI near the measuring sites in the Netherlands are included in the
database. The sources of the data, their formats, the procedures to
process the data, the databases which are constructed to include the data
in a systematic way and time series of the CH4 measurements over the
period 1990-1994 are described in this report.

In order to increase our knowledge of methane emissions on a small scale
the project 'Sources, regional scaling and validation of CH4 emissions
from the Netherlands and Northwest Europe' is carried out in the
framework of Phase 2 of the National Research Program on Global Air
Pollution and Climate Change (NRP-2). This project aims at the
development of a validated CH4 emission database on a scale of 5x5 km and
25x25 km for the Netherlands and Europe respectively for the main source
categories. CH4 emissions are validated in this project by comparing
results of atmospheric models which use this emission database as an
input, with measured CH4 concentrations. In this report the data of
methane measurements at 4 locations in the Netherlands and 3 locations in
Northwest Europe over the period 1990-1994 are gathered and reported.
Besides data on CH4 concentrations also meteorological data as measured
by KNMI near the measuring sites in the Netherlands are included in the
database. The sources of the data, their formats, the procedures to
process the data, the databases which are constructed to include the data
in a systematic way and time series of the CH4 measurements over the
period 1990-1994 are described in this report.